Boring-tool.



H. R. DECKER. BORING iTooL. APPLICATION FILED JAN.2 1, 1911.

1,039,909. r Patented Oct. 1, 1912.

WITNESSES:

INVENTOR- 4' 7 Q Jy/BY z ATTORNEY 2 I To all it may concern:

bination of a bit and reamer.

UNITED sTATEs PATENT. OFFICE."

HARRY. R. DECKER, or Hous'roiw, Terms.

BORING-moon.

Specification of. Letters Patent, Patented Oct, 1,1912, p J Application filed Jan-nary 2-1 1911. Serial No. 603,898;

Be it known that I, HARRY R. DECKER, a citizen of the United States, residing at Houston, in thgcounty of Harris and State of Texas, have invented certain new and useful Improvements in Boring-Tools, of which the following is a specification.

My invention relates to new and useful improvements in boring tools and moreparticularly to such devices as include the com- The object of the invention is to provide a device of' the character described which will operate as a bit, in the ordinary manner, and at the sametime will ream. out. the hole bei g bored, remove all obstructions jutting out into the bore, and insure a perfectly round .and reasonably straighthole when completed.

' With the above and other objects in view my invention has particular relation to cer-" tain novel features of construction, operation and arrangement of parts an example of which is described in this specification and illustrated in the accompanying draw ings, wherein O 1 Figure 1 is a side elevation of the device connected to a drill stem and shown 'in operation. Fig. 2 is an enlarged sectional view of a modified forrn of the reaming portion of the device. Fig. 3 is a' plan view of the reaming portion of the device. Fig. 4 is a side elevation of one of the cutters. Fig. 5 is an end view thereof, and'Fig. 6 is a side elevation of the boring tool shown passing through inclined strata with the cutters of the, modified reaming portion in operation.

Referring now more particularly to the drawings the numeral7 designates a drill stem designed to carry the tool. Thiscom bined bit and reamer includes the bit 8,

" the collar 9, the cutters 10,, the internal end, '11 and the rotatable-reamers 16.- The lowerend of this c'ollar is internallythread ed so as to receivethe outwardly threaded upper end of bit 8 and the upper end of said collar is internally threaded was to receive of rows of perforations 12, which aline the threaded end of the drill stem.

The collar 9 isprovided with a plurality around the same and are provided to receive the cutters 10 which are carried by said collar and project therefrom. Each cutter is,

held: in the collar by reason of a head 13 which fit-s in the enlarged portion 14:- of

its perforationsothat said head will be flush with the inner surface of the collar.

-' These cutters are, preferably, square in threaded corresponding portions of collar 9. i

Said cuif nicely fits within said collar and against the inner ends of the cutters and holds said cutters firmly in place. The cuff is also provided with recesses 15, in one end thereof, in which the wrench, used in screwing the same "in place may engage. The collar also carries a'plurality of reaming members 16, arranged as shown in Figs. 1 and 3 and supported by bearing members 17 in which theyv are rotatable.

When the bit strikes a boulder or encounters inclined strata, it has a tendency to be deflected from a straight course as shown in Fig. 6, and by reason of the various formations through which it passes, when an ordinary bit is used, the bore may havev a varying course, the stem being much smallef in diameter than the bore, permitting the bit to. have considerable lateral play. In ordereto overcome this irregular lateral movement of the bit the ends of the cutters Z are made blunt and project from the bit laterally and contact against the wall of the bore and steadythe bit; The ends of the cutters being blunt, do not readily wear away and the cutters admit of free waterlateral movement of the bits The reaming members 16 have corrugated 'orroughened surfaces and thus ream out the hole as being bored. In case a boulder or inclined strata are encountered this improved boring tool is very effective in keeping the bit centered relative tothe bore in preserving a .perfectly round bore and in cutting off all projections; which jut out from the wall thereof and the bore when completed isthus ready to receive the well casing.

1. A device of the character described including a bit,-a supporting collar-therefor,

a plurality of' detachable cutters passing radially through said support, a head car} ried by each cutter for securing the cutter in its collar and a cufl' secured Within the for, a

1 through said collar, eachc cutter being provided with a collar and resting against the cutter heads.

52. A'device of the character described ineluding a bit and asupporting collar there plurality of cutters passing radially cutting edge underneath, a head carried by the inner end of each cutter and resting in acorresponding recess in said collar, anda, cufi secured within the collar and resting against the heads of said outters. s

Y 3. A device of the ,character described including a supporting collar and a bit car- "ried thereby "plurality of cutters i and detachable therefrom, a passing radially through the collar and beingprovided, each, witha. cutting "ed 'e underneath, a head for each cutter carried by the inner end thereof and resting in a corresponding recess said;

collar, a cufi' secured Within the collar and resting against the cutter heads and a plurality ofrotatable reamers carried upon the periphery of. the collar. 4. A device of the character described including a bit and a supporting collar therefor, a plurality\ HARRY R. DECKER; Witnesses: i

A.--'ToMPi:iNs, J W. YEAGLEY.

of cutters passing radially through said co lar, each cutter be- 

